<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>websocket测试</title>
</head>
<body>
<div id="sse">
    <a href="javascript:WebSocketTest()">运行 WebSocket</a>
</div>
</body>
<script type="text/javascript">
    function WebSocketTest() {
        if ("WebSocket" in window) {
            alert("您的浏览器支持 WebSocket!");
            // 打开一个 web socket
            var ws = new WebSocket("ws://localhost:8080/websocket/1");
            ws.onopen = function () {
                // Web Socket 已连接上，使用 send() 方法发送数据
                var message = {"toUserId": 2, "content": "发送数据"}
                let s = JSON.stringify(message);
                ws.send("111111");
                alert("数据发送中...");
            };
            ws.onmessage = function (evt) {
                var received_msg = evt.data;
                alert(received_msg);
            };
            ws.onclose = function () {
                // 关闭 websocket
                alert("连接已关闭...");
            };
        } else {
            // 浏览器不支持 WebSocket
            alert("您的浏览器不支持 WebSocket!");
        }
    }
</script>
</html>